is 2 4890139 - 1
has 1472079 decimal digits
takes 0.678 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L531026AB11510B9Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27197.763767.6056%410000110700000.19913.5383%97.962968.7518%1.1462%
PrimeNet2610.062862.2951%220004500000.00913.3010%0.071963.5397%1.2446%
GPU722651.491964.6154%320007000000.01372.3732%1.505765.4551%0.8397%
Difference+6+96.2718+2.9902%+378000+10370000+0.1854+1.1651%+96.4572+3.2967%+3.2967%

Known prime factors:
No known factors for M4890139

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-25T14:45:00Carsten Kossendeydurandal30000435000---0.010--0.888%
2014-01-12T13:00:00David Campeaui5-2500k41000011070000---0.199--3.538%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-01-21T00:00:00ANONYMOUSv4_computers21261--0.063--
2010-04-16T20:18:00garonorth261262--0.063--
2011-10-09T23:38:00GrunwalderGIMPManual testing21263--0.326--
2016-02-23T16:39:03Mark RoseManual testing262263--0.201--
2015-01-07T16:37:00VictordeHollanderManual testing263264--0.401--
2015-01-07T16:37:00VictordeHollanderManual testing264265--0.764--
2015-07-22T21:15:00snme2pm1Manual testing265266--1.528--
2017-10-31T15:30:51YxinityManual testing266267--3.056--
2018-05-08T11:46:41ramgeisManual testing267268--6.112--
2018-06-09T17:36:52YxinityManual testing268269--12.22--
2018-06-09T17:36:52YxinityManual testing269270--24.45--
2020-12-03T20:03:57-Anonymous-Manual testing270271--48.90--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.886 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.886 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.886


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-08T00:00:00ANONYMOUSv4_computers531026AB11510B9E0.678
2000-04-12T00:00:00ANONYMOUSv4_computers531026AB11510B9E0.678


PRP results:
No PRP results for M4890139


P-1 factor-bounds graph:
B1 = 410000, B2 = 11070000 (P-1 stage 2)
B1 = 410000 (P-1 stage 1)
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-12-03T20:03:57+00:00